Tangential hose clamp



July l2, 1960 Filed July 9, 1958 .1. B. BLACK 2,944,314

TANGENTIAL HosE: CLAMP 2 Sheets-Shea?l 1 INVENTOR (fa/Irl B, B/ac'k ATTORNEY July 12, 1960 .11. B. BLACK v 2,944,314

v TANGENTIAL Hose: CLAMP Filed July 9, 195s :esmas-sheet 2 r' ,A 2,944,314 Ice Patented Jpl'lly 12 1960 vrAisroEN'rrAL nosE CLAMP John B. Black, Berkeley Springs, W. Va., assigner to Murray Corporation, Towson, Md., a corporation of Maryland Filed July 9, 1958, Ser. No. 747,531

9 Claims. (Cl. V24-279) This invention relates to a hose clampto maintain a hose on pipes and tubes in automobiles and airplanes and for other similar uses.

The objects of the invention are to produce a strong clamp which may be tightened to an unusual degree and which will hold more firmly after being tightened and which may also be readily loosened. A further object of -the invention is to produce a housing for the screw of the clamp which is held on the band by. a key which not only rmly holds the housing on the band, but holds the housing from expansion upon rearward thrust of thescrew. Another object of the invention is to enlarge the screw, likeva cone, near the head and to shape the holding face portions of the screw threads flat, especially those near the screw head, so that the threads of the screw more firmly engage a larger number of bars between openings in the band to increase the strength of the hold of the screw on the band. The partial conical screw shape so divides the load on the band bars as to substantially eliminate binding of the screw in the band. Another object of the invention is to provide the housing at the closed end with aiflange, so that the end strengthens the housing to aid it to maintainits rigid position upon the screw. Another object of the invention is to assure complete circumferential pressure, to provide hydraulic sealing of the hose. Another object is lto lower a part ofthe anchored end of the band in the housing to allow the screw threads to pass clear through the openings in the band free end to give those threads a iirm grip on the band.

Other objects and advantages of the new clamp will be apparent from the following description and the accornpanying drawings forming a part hereof inwhich:

Figure l is a side elevational view of a fragmentary band showing the new housing and screw therein.

Figure 2 is a longitudinal sectional view through the screw and housing showing their co-relationship with the band.

Figure 3 is a transverse sectional view on line 33of Figure 1.

Figure 4 is a similar view on line 4-4 of Figure l.

Figure 5 is a fragmentary end elevational view of the screw head.

Figure 6 is a fragmentary view of the end of theband before its attachment to the housing.

Figure 7 is a transverse sectional View on line 7--7 of Figure 2 with the housing and screw being shown in dot-ted lines.

In the drawings similar numerals refer to similar parts throughout ythe several views.

The hose clamp comprises a band 1 having end 2 attached to the housing 3 by means of a "key 4 and a screw 5 extends through the housing and has threads 6 thereon to engage bars 7 in the free end 8 of the band 1 left by cutting slots 9 in the band.

The band is longitudinally slotted las shown -at`10 to form outside strands 11 and a center strand 12. 'I'he strands 11 are bent upward from the center strand 12 as clearly shown in Figures 2, 3 and 7 to leave an opening 13 therebetween. The center strand 12 follows the curvature of the rest of the band as shown at 14 so that the side strands 11 form a ramp 15 to guide the free end 8 of the band upwardly and through the housing 3.

The housing 3 is formed with sides 16 tolcontain a screw with reasonable rotating clearance and it has an end wall i7 with a projecting llange or lip 18 thereon to give additional strength to maintain the housing in its proper shape. The other housing end is constricted into a neck portion as shown at 19 which forms a bead atthe open end of the housing for the reception of the screw 5 therethrough and the depending sides 16 of the housing are ared outwardly to surround the band 1 and these sideshave slots 2.0 out therein just above the angle where the lower edges 2l of the sides are bent under the strands 11 of the band 1. In this position these edges 21j are substantially in the same horizontal plane as the lower side of the center strand 12, as shown in Figures 3 and 7.

A transversely extending key 4, having one end 22 bent at right angles to it is inserted through `the slots 20 and the openings 13 between the strands of the band and then the other end f2.3 of the key is bent up to hold the key in place and also to securely hold the housing clamped together on the band and, of course, the key serves'its prime purpose to prevent tangential movement of -the housing around the band.

The screw 5 has the head 24 which may be turned by several styles of wrenches or a screw driver or with pliers;

Threads 6 are preferably formed on a radiusto present a at working surface to as many bars '7 as possible in the tightening of the screw as clearly shown Ain Figure 2. Toward the head of the screw and fromthef center, the shape of the screw resembles a cone. This shape primarily gives a larger number of band bar contacts with the valleys 25 between the threads as likewise shown in Figure 2 to greatly increase the strength of the hold of the screw upon the band in the tightening of the screw. The threads pass clear through the openings between bars 7, as shown in Figures 2 and 7. K

The screw also has a reduced section 26 between the threads and the head 24 which ts securely within the bead 19 of the housing. The bead 19 is so wide longitudinally of the housing as to prevent its riding between the threads 6 of the screw so that the screw is inserted into the housing after the assembly of the housing upon the band simply by the main force of expanding the housing because of its resilience and the forward slope of the edge of the bead as shown at 27 so that as the screw is inserted the housing expands and permits the insertion after which it contracts again to surround securely the restricted portion of the screw. The enlarged shoulder 28 of the screw contacting the bead 19 holds the screw in releasing the clamp from a hose.

Although it is possible to construct the clamp of this invention without the projecting nose journal 29, it has been found that that journal increases the band tension strength of the clamp considerably. This nose journal 29 goes through opening 30 in the end of the housing.

. YIt will be apparent that many changes may be made in the construction of the housing and screw as well as lthe band of this'invention without departing from what is essential in the invention, which is defined in the follow- I enligne transversely ldflthe band, ka vthreaded screw in said housing having -a yhead -at -one lend extending in ythe direction of said other band end and alreduced portion between the head and screw threads, the housing having a wall at the end `Vadjacent Tthe 'attached 'band IAend lextending adjacent 'the yband and a kbead 'at the opposite end resiliently expansible and l.ct'mtr-actibl-e transversely o the screw and closely `surronnding said reduced -portion of 'the screw, the bead "beingwider, axially, longitudinally of the screw, y'tliantl're thread pitch df 'the screw, the bead expanding upon insertion of the screw threads therethrough and after insertion because of its resiliency, contracting around the -screw reduced -portion 'to securely hold the fscrew in hehousingfat all times.

The 'clamp of clair-n l Vin which Vthe screw has a journal bearing 'nose yat :the end opposite `the head and the housing wall 'end has an opening to receive said journal `hearingnose therein. f3. rThe clamp-of-elairn d 'in'which the saidheusing end 'Wall `has la flange projecting outwardly therefrom adja- 'cent the said other end of the 'band as it is threaded throughlthe housing. A

i4. The A'clamp of clairn l in which the screw has a journal hearing nose at the vend opposite the head and the housing end vwall -has an fopening therein to receive said journal bearing nose therethrough, and adjacent said 'other-end Oftlhe band as it is threaded through the housing, the hous'ing v'end -Wall has a "flange projecting out- Wardly thereon. Y

S. The Aclamp of claim 1 in which the axis of the screw is substantially tangential to the band and the 'screw 'end adjacent the reduced portion of the 'screw is :increased .in diameter to present more screw threads to the 'band bars between the openings when the band isicurved'ona hose inuse.

6. A tangential screw hose clamp comprising a band adapted 'to embrace a hose, having a housing end and a threading end having 'in the threading end screw thread receiving "bars between vopenings transversely of the band, the band at the housing end being longitudinally slit adjacent-but spaced v'from said Yhousing end into two outer side strands Yand a 'central strand, the central strand being curved regularly in line withthe band and the outer side strands extending radially outwardly therefrom, forming `an opening between the center and outer side strands,

a housing extending longitudinally of the band having a screw receiving central portion and depending sides extending under the baud at the side extremities, the housing sides having openings adjacent but spaced from the bent under lower side extremities of the housing, a key passing through said housing side openings and the opening between 'the strands, the lends of the key being bent around the housing sides to holdl them securely together and a screw in said housing, `the threads o'f which engage the'bars of ythe band threading end.

7. The clamp of claim 6 in which the key ends are bent upwardly 'toward the screw receiving-central portion of the housing. l l

8. The clamp of claim '6 in which Vthe housing end adjacent the attached b'and end has a depending transverse wall extending adjacent the hand and a flange on the wall'edge projectingtoutwardly from the wall.

9. The'clamp of claim 6 including en said screw a head at one end extending in the direction of vthe threading end of the band and a `reduced portion between the head and screw threads, the vhousing having a .wall at `the end adjacent the Vattached band end extending adjacent the band and a bead at the opposite end resiliently expansible transversely 'of the screw 'and closely surrounding said reduced portion of the screw, the bead being wider, longitudinally of the screw, than the thread pitch lof the iscrew, the `bead expanding upon insertion of the screw threads therethrough and after insertion because of its resiliency, contract-ing around Vthe screw reduced portion to securely hold thescr-ew-inthe housing at all times.

vReferences Cited in the file of this .patent vUNI'IIEB STATES PATENTS 2,395,273 Hina a1. Fen 19, 1946 2,767,455 Schaefer oct. 2'3, 1956 2,820,276 'Cnuss et a1. Jan. 21, 1958 Y .FoR-:arGN PATENTS v 518,2167 neigium Apr. 15, 1953 677,749 Great Britain Aug. 2o, 1952 745,123 Gre-at Britain Feb. 27, 1956 

